1

Possible:
Mri is not a sensitive tool for sinusitis. Often, the sinuses are normal when one lights up on an mri. Your symptoms are not classic for a sinus infection, and MRI is better for looking for central nervous system problems as the cause of your headache. I would ask your doctor for an antibiotic good for sinusitis and follow up with a ct scan of the sinuses for the definitive answer.
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2

Maybe nothing:
The fact that you have scattered mucosal thickening (not necessarily disease) in the sinuses does not necessarily equate to disease. Do you have yellow-green nasal discharge, post nasal discharge, pain or pressure in the face or top of the head? These are the major symptoms of rhino-sinusitis. In other words, are you feeling ill? Check with an ENT doctor.
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3

MRI very sensitive:
Just because you have something in the sinus, it does not mean it is the cause of your symptoms. Retention cysts are common. Does light or sound bother you when you have the headache? Do you have visual changes before the headache comes? If so you may have migraineallergies can also have these MRI findings.
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5

Many options:
The ct is telling you there is mild inflammation of the ethmoid sinuses, but that has no effect on breathing. You breathe through your nasal passages, so a deviated septum, turbinate congestion, polyps, and other intranasal obstructions can affect breathing. Allergies certainly can contribute. Discuss this with an ENT specialist to see if there is some help for you with medication or surgery.
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7

Chronic sinusitis :
Chronic allergic rhino sinusitis can definitely be causing your symptoms. I would recommend a one month trial of daily antihistamines like Claritin or zyrtec and nightly sinus rinses. If your symptoms are not better i would see an ENT like me who specializes in nose/sinus surgery to discuss options.
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10

Between the eyes:
The ethmoid sinuses are between the eyes and are commonly the result of viral and or bacterial infections starting in the nose. The answer to your question is the ethmoid sinuses are infected and the lining membrane is thickened. The only method to prove your diagnosis is with a cat scan of the sinuses.
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